Variable Control Voice Actuator

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The term Variable Control Voice Actuator (VCVA) refers to a digital recording technology developed by Olympus, which is implemented in many of their digital voice recorders. [1] It prevents the recording of silence, so pauses in a speaker's dictation do not waste time, power or recording space.

Digital recording

In digital recording, audio signals picked up by a microphone or other transducer or video signals picked up by a camera or similar device are converted into a stream of discrete numbers, representing the changes over time in air pressure for audio, and chroma and luminance values for video, then recorded to a storage device. To play back a digital sound recording, the numbers are retrieved and converted back into their original analog waveforms so that they can be heard through a loudspeaker. To play back a digital video recording, the numbers are retrieved and converted back into their original analog waveforms so that they can be viewed on a video monitor, television or other display.

Function

When the microphone picks up an arbitrary level of sound, the VCVA initiates recording, and when volume detected by that microphone dips down below said threshold the VCVA stops recording. [1]

Microphone a device that converts sound into an electrical signal

A microphone, colloquially nicknamed mic or mike, is a transducer that converts sound into an electrical signal.

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